Building slab



May 15, v1923.

F. PONTELLO BUILDING SLAB 1922 2 Sheets-Shes?l 1 Filed June l May 15, `1923.

F. PONTELLO BUILDING SLAB l2 Sheets-Sheet 2 I Filed June 1. 1922 da W. 0 P f Patented May l5, l923 FRANK ronfrnnno, on catenin-fr, niente-nn.

BUILDNG SLAB.

Application full, clear, and exact description ot the in vention, suoli ill enable others skilled in the art to wl nch it appertains to make and use the saine.

rllhis invention relates to an improved block or slab for use in forming a root and one object ot the invention is to provide a slab which can be mounted in manner assuring ot its remaining` firmly in place and to further so construct the slabs that they may be readily pnt in place and a root provided having a solid appearance.

Another object ot the invention is to provide a slab Which is so constructed that it will be prevented from having any tendency to readily crack or break from expansion or contraction and Which izzay be easily handled Without danger oi its being broken by rough usage during handling.

Another object ot the .intention is to provide a slab ivhich will have a hollow construction thus providing a ventilated slab preventing the forming ot moisture against the inner tace ot the slab and further pre- `venting the moisture trom having any tend4 ency to work through the slab When the outer 'tace is Wet by rain or snow.

Another object ot the invention is to so construct these slabs that when put together, the root' will have a solid appearance externally but will be provided ..vith air pockets With the air pockets ot one slab communicating with the air pockets of adjoining slabs,

Another object of the invention is to so construct the slabs that the means tor anchoring them to the root may consist of anchoring ivires embedded in the slabs and extending from the inner faces of the slabs tor engaging the cross beams ot' the Walls, the portions embedded in the slabs being attached to strips ot mesh which are embedded in the slabs to reinforce the slabs.

This invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a perspective view oi' the improved slab.

Figure 2 is a sectional view taken along the line 2-2 of Fig. l.

filed June l,

sensi no. acacia.

Figure 3 is a vieiv in elevation showing a number ot the slabs in use.

Figure el is a vertical sectional view through the structure shoivn in Fig.

Figure 5 is a perspective vieiv oit a portion ot the Wire mesh used to reinforce the sialich This improved cement slab is indicated in general by the numeral l and will be formed in a suitable mold. Opposed edge faces have been provided with tongues 2 and grooves 3 so that when the slabs are put together as shown in Figs. 3 and 4, the tongues vvill lit into the grooves and thus provide tight joints between the slabs. When making the block or slab, the cement is poured into the bottom of the mold and a strip of wire mesh is then placed Within the mold. This Wire mesh t which is to reinforce and strengthen the slab, carries wires 5 Which are firmly anchored to the Wire mesh as shown near the upper corners ot the slab. After being connected With the Wire mesh, the Wires are bent to extend from the slab. Vheu the slabs are first formed, the vvires Will extend straight out from `them as shown in Fig. 2 but When in use, the Wires will be bent as shown lin F t so that they can be passed vt-hrough eyes 6 carried by the rattentorming I- beams T. It is of course understood that it desired additional Wires can be provided so that in case very large slabs are formed, the framework tor the root of the building may include additional I-beams Which Will be positioned intermediate those shoivn in Fig. 3. After the mesh t has been put in place, additional cement is poured into the mold unt-il the slab has been formed the desired thickness. Sufficient cement will be poured into the mold to cover the mesh and then cores Will be put in place so that when the slab is formed the proper thickness by additional cement and has been allowed to set and become hard, the cores can be removed and air spaces 8 provided so that the slabs Will be ventilated and thus moisture prevented from Working through the slabs. From an inspection of Fig. l, it will be readily seen that these air spaces 8 extend transversely of the slabs and that each slab is provided with a plurality oct these air spaces. Each air space is reduced intermediate the Width of the slab, thereby permitting the slab to be prevented from being weakened. It Will thus be seen that a cement slab Will be provided which can be very 'readily putin place yand securely supported and Which will be so constructedl that it Will not be liable to readily break or crack and which will further be so Constructed that it will be provided Withair spaces.

I claim:

`l. A building slab formed of molded plastic und having, air pockets extending through. it, each pocket being reduced in width at points intermediate its length and having reduced neck portions at its ends projected through theedge feces of theslab. 12. A building slabvormed of. molded f' plastic and having air pockets extending through it, Veach pocketb'eing reduced' in v Width-at points intermediate itslength and having reduced neck portions at its ends projected through vthe edge faces of the slab7 the neck at one end of thevpocket beinglout of alinement with the neck etthe other end of the pocket. y v

3. A building slab Jformed .of vmolded v'plastic und having `air pockets extending through it, each pocket being reduced in Width at points intermediate its length to provide sub-compartments connected by reedge faces of the slab, theneclr at one end y ofthe pocket being out of ulineinent With the necl at the other end of the pocket.

'In testimony vwhereof l have hereunto set my hand. v .n Y.

FRANK PONTELLO. 

